Are You Alarmed All the Time?

The disciples in the upper room, they're alarmed. Jesus, did he not tell everyone what was going to happen? Didn't he tell them that? There's a sense of alarm. Even though he spoke to them time and time again about what his journey was, somehow they have seemed to forget. It could be either that, or one thing that i wonder about is, it's not necessary that they forgot but i wonder if it's just they've been disappointed and let down so many times.